Urgh, its been a nightmare of a day. LaTEX won't do what I want it to do for my paper and TEXshop isn't helping. Damn.
Spent most of the rest of the day trying to write a wavelength calibration program but haven't been able to match the spectral lines in the line list to the ones I can see in the Arcs. The lightbulb went off 5 minutes ago, I, as usual had made a stupid assumption and confused two different sky lines. Still the object spectra look quite pretty, if I can only rectify them properly I'll be happy.